Esterification Of Glucose

Object: The purpose of this experiment is to perform an esterification on glucose to buzz off glucose pentaacetate, and to compare the melting point and specific rotation of the convergence to the literature data to confirm which of the ?- and ?-anomers is the major crossroad of the reaction. comparison: observational Data and Observations: mesa 1. Reagents heterogeneous| MW(g/ breakwatere)| use| mole| Physical and Safety Data| Acetic anhydride,C4H6O3| 102.09 | 20 mL| 2.12 x 10-1| bp 138-140 oC, d 1.08 g/ mL. Lachrymator. Flammable. Corrosive. Harmful by consumption and swallowing.| Sodium acetate,NaOAc (NaC2H3O2)| 82.03 | 4 g| Catalyst| toxicant in large amounts. Small amounts may be serve mountain the sink.| Glucose| 180.16| 4 g| 2.22 x 10-2| Combustible. Explosive. Limiting reagent.| remit 2. Products blend| MW(g/ mole)| Isolated| Moles| Yield| Physical Data| Glucose pentaacetate| 390.34| 6.06 g| 1.55 x 10-2| 69.82 %| May be harmful if inha led, swallowed or absorb through skin. May cause eye irritation.| Table 3. run manoeuver enhance| Literature Melting Point| Experimental Melting Point| Glucose pentaacetate| ?-glucose pentaacetate: 109 - 111 oC?-glucose pentaacetate: 130 132 oC| 117 121 oC| Table 4.

Polarimetry Data Compound| Mass (g)| Volume (mL)| dumbness (g/mL)| ? (at 589nm)| Length (dm)| [?] (o)| Glucose pentaacetate| 0.2| 25| 0.008| 0.11| 1.0| + 13.75| Table 5. NMR Analysis ?| integrating| Municipality| J values| appellation| 6.28| 1.00| doublets| 3.6| alkenyal CH| 5.67| 35.5| doublets| 8.2| alkenyal CH| Calcula tions: % Yield = (experimental/ theoretica! l) x 100 By moles: (1.55 x 10-2 mol/ 2.22 x 10-2 mol) x 100 = 69.82 % Polarimetry: Glucose pentaacetate: slow-wittedness = 0.2 g/ 25 mL = 0.008 g/ mL [?] = (?)/ (l x c) = 0.11 / (1 x 0.008) = + 13.75 o Discussion: The esterification of glucose in the presence of sodium acetate as a...If you want to get a full essay, order it on our website: BestEssayCheap.com

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